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Find how many grams of carbohydrate does a person of mass 74 kilogram need to metabolize to climb five flights of stairs (15 meter height increase)? Each gram of carbohydrate provides 17.6 kilojoules of energy. Suppose 10.0 percent efficiency - that is, 10.0 percent of the available chemical energy in the carbohydrate is converted to mechanical energy. Explain what happens to the other 90 percent of the energy?
cancer patient is undergoing radiation therapy in which protons with an energy of 1.2 MeV are incident on a 0.10-kg tumor. How many protons are absorbed by the tumor
two converging lenses having focal lengths of 5.0 cm and 10.0 cm are located 21.0 cm apart. an object is placed 15.0 cm
What will be the equilibrium temperature when a 239 g block of copper at 274 degrees C is placed in a 140 g aluminum calorimeter cup containing 817 g of water at 13.7 degrees C?
A block of weight 3.9N is launched up a 30 degrees inclined plane 2.10m long by a spring with k = 2.15kN/m and maximum compression 0.10m, Does the block reach the top of the incline
A sailboat runs before the wind with a constant speed of 3.7 m/s in a direction 32 degrees north of west. How far north has the sailboat traveled in 21 min
A particle moves along x axis according to equations x =2.00+3.00t-1.00t2, where x is in meters and t seconds. At t=3.00s, determine (a) the position of particle. (b) its velocity, and (c ) its acceleration.
Ultrasound with a frequency of 4.25 MHz can be used to produceimages of the human body. What is the wavelength in the body
a boy whirls a stone in a horizontal circle of radius 1.3 m and at height 1.6 m above ground level. the string breaks
a photon of wavelength 0.55000 nm strikes a free electron that is initially at rest. the photon is scattered straight
Suppose an object is placed at the edge of a recordplayer. The record player has a diameter 30.0cm and rotatesat 33.3 RPM (revolutions per minute). how fast is the outside edge of the record moving
Oscillation of a 500 Hz tuning fork sets up standing waves in a string clamped at both ends. The wave speed for the string is 430 m/s. What is the length of the string
A bartender slides a drink along a bar to a customer seated 3 metres away in the positive x direction. At what initial speed should the bartender send the drink
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